Things You'll Need:
- Large pot
- Paper towels
- Mixing spoon
- 2 tablespoons salt
- 8 ounces udon noodles
- 6 1/2 cups water
- 1 1/3 ounce katsuobushi (dried bonito) flakes
- 1 teaspoon salt
- 2 tablespoons dark soy sauce
- 2 tablespoons light soy sauce
- 1 tablespoons sugar
- 1 tablespoons mirin (Japanese rice wine)
- 8 large prawns, with shells removed
- 14 ounces firm tofu, diced
- 4 cups baby spinach leaves
- 4 scallions, thinly sliced
- Shichimi (optional)
- Sesame oil (optional)
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Step 1
Fill a large pot with water and add 2 tablespoons of salt.
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Step 2
Bring the water to a boil and add the udon noodles.
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Step 3
Cook the noodles until they become tender, about 5 minutes.
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Step 4
Drain the noodles and rinse them with cold water. Set the noodles aside.
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Step 1
Place 6 1/2 cups of water into a large pot. Turn the burner to a medium heat.
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Step 2
Add the katsuobushi flakes to the pot just before the water boils.
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Step 3
Once the water reaches a boil, add the dark soy sauce, light soy sauce, sugar and mirin. Stir the mixture to dissolve the sugar.
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Step 4
Remove any foam that rises to the surface with a large mixing spoon.
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Step 5
Taste the broth and adjust seasonings if necessary. You may add some shichimi for extra spice.
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Step 6
Take the pot off of the stove and strain the broth with a paper towel.
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Step 7
Place the pot back onto the burner and bring to a boil again.
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Step 1
Add the prawns and tofu to the dashi broth. Allow the prawns to cook through, about 3 to 5 minutes. The prawns will float when they are fully cooked.
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Step 2
Turn off the burner. Add the udon noodles and spinach leaves.
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Step 3
Top off the soup with chopped scallions and a drizzle of sesame oil.
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Step 4
Dish the soup into four bowls and serve immediately.












